A little over a year ago the Flash Builder 4.5 plug-in for SAP NetWeaver Gateway was published as a beta on Adobe Labs (at http://labs.adobe.com/technologies/flashbuilder_sap). As a research beta, the plug-in only works with older versions of Flash Builder (4.5 and 4.6). The plug-in was never shipped as an official product, and isn’t going to be developed further – we’ve discussed open-sourcing the project with the code owners but this is unfortunately not going to be possible.
If you still rely on this research project, please grab the bits now – as part of routine cleanup it will be disappearing off of Labs in April 2013.